| Presentation | 2016-04-22 Experimental Verification of Multiuser Massive MIMO Null-Space Expansion using Measured Channel State Information Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Transmission capacity of multiuser MIMO systems is degraded by inter-user interference (IUI) caused due to channel time variation. Null-space expansion was proposed to suppress such IUI by additional null-steering exploiting excess degrees of freedom (DoFs) of massive MIMO. This paper addresses the signal-to-interference ratio (SIR) performance achieved by proposed null-space expansion scheme using measured channel state information (CSI). It is confirmed that the proposed scheme shows superior SIR performance to conventional channel prediction scheme at some user equipment (UE) speed conditions. In addition, we show that further increasing of the null-space dimension can suppress IUI stably. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | massive MIMO / multiuser MIMO / null-space expansion / channel time variation / inter-user interference |
| Paper # | RCS2016-21 |
| Date of Issue | 2016-04-14 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2016/4/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Romantopia, A Landscape of Forest and Stars, Hirosaki City |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Radio Access Technologies, etc. |
| Chair | Makoto Taromaru(Fukuoka Univ.) |
| Vice Chair | Hidekazu Murata(Kyoto Univ.) / Satoshi Denno(Okayama Univ.) / Yukitoshi Sanada(Keio Univ.) |
| Secretary | Hidekazu Murata(Mitsubishi Electric) / Satoshi Denno(NTT DoCoMo) / Yukitoshi Sanada |
| Assistant | Jun Mashino(NTT) / Tetsuya Yamamoto(Panasonic) / Takamichi Inoue(NEC) / Tomoya Tandai(Toshiba) / Toshihiko Nishimura(Hokkaido Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Verification of Multiuser Massive MIMO Null-Space Expansion using Measured Channel State Information |
| Sub Title (in English) | |
| Keyword(1) | massive MIMO |
| Keyword(2) | multiuser MIMO |
| Keyword(3) | null-space expansion |
| Keyword(4) | channel time variation |
| Keyword(5) | inter-user interference |
| 1st Author's Name | Tatsuhiko Iwakuni |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 2nd Author's Name | Kazuki Maruta |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 3rd Author's Name | Atsushi Ohta |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 4th Author's Name | Yushi Shirato |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 5th Author's Name | Takuto Arai |
| 5th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 6th Author's Name | Masataka Iizuka |
| 6th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| Date | 2016-04-22 |
| Paper # | RCS2016-21 |
| Volume (vol) | vol.116 |
| Number (no) | RCS-11 |
| Page | pp.pp.117-122(RCS), |
| #Pages | 6 |
| Date of Issue | 2016-04-14 (RCS) |